ruby multiple string match with [duplicate]

Question

i've written a few lines of code like this :

if( (user_input.include?('string_a') || 
    (user_input.include? ('string_b')) || 
    (user_input.include?('string_c')) ) 
    && 
    user_input.include?('string_d_keyword'))
    ....
end # if

is there any function which can simplify the "multiple or string match" by taking multiple arguments and look like this ?

if( (user_input.multi_include_or?('string_a','string_b','string_c')) 
    && (user_input.include?('string_d_keyword')))
.....
end # if

i hope to do these all in a single line and so i've leave out the option of "case when".

Thanks~

I deleted my answer after seeing that I misread the question. I thought user_input was an array of strings. It's perfectly clear that it's a string. — Cary Swoveland
– Cary Swoveland, Commented Feb 22, 2017 at 7:28

flogram_dev · Accepted Answer · 2022-02-22 09:56:25Z

5

You can do a regex match using | (or):

if user_input.match? /string_a|string_b|string_c|string_d_keyword/
  …
end

If your strings are in an array you can use Regexp.union to convert them to the corresponding regex:

if user_input.match? Regexp.union(strings)
  …
end

edited Feb 22, 2022 at 9:56

answered Feb 21, 2017 at 22:55

flogram_dev

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2 Comments

jimzcc Over a year ago

thanks for the reply. BTW, i have to use this format to make it work : user_input.match( /string_a|string_b/ ) thx again~

RCA Over a year ago

Regex.union should be Regexp.union fyi.

Coolness · Accepted Answer · 2017-02-21 22:13:12Z

1

Use an array and any?

> user_input = "string_a"
=> "string_a"
> ["asd","string_a"].any? {|a| user_input.include? a}
=> true

answered Feb 21, 2017 at 22:13

Coolness

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1 Comment

Coolness Over a year ago

What's with the downvote? Is there something wrong with this solution?

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